ivshmem: Fix integer width warnings in ivshmem-test
ivshmem: Fix integer width warnings in ivshmem-test

ivshmem-test.cpp(180): warning C4244: 'argument': conversion from 'IVSHMEM_SIZE' to 'std::size_t', possible loss of data

ivshmem-test.cpp(98): warning C4477: 'printf' : format string '%u' requires an argument of type 'unsigned int', but variadic argument 1 has type 'IVSHMEM_SIZE'
         ivshmem-test.cpp(98): note: consider using '%llu' in the format string
         ivshmem-test.cpp(98): note: consider using '%I64u' in the format string1

Signed-off-by: Ladi Prosek <727f16b97cf99ec0710180d99386e4875fb7e2eb@redhat.com>

YanVugenfirer/kvm-guest-drivers-windows,virtio-win/kvm-guest-drivers-windows,daynix/kvm-guest-drivers-windows,gnif/kvm-guest-drivers-windows,virtio-win/kvm-guest-drivers-windows,vrozenfe/kvm-guest-drivers-windows,YanVugenfirer/kvm-guest-drivers-windows,ladipro/kvm-guest-drivers-windows,virtio-win/kvm-guest-drivers-windows,vrozenfe/kvm-guest-drivers-windows,virtio-win/kvm-guest-drivers-windows,ladipro/kvm-guest-drivers-windows,YanVugenfirer/kvm-guest-drivers-windows,YanVugenfirer/kvm-guest-drivers-windows,vrozenfe/kvm-guest-drivers-windows,vrozenfe/kvm-guest-drivers-windows,virtio-win/kvm-guest-drivers-windows,gnif/kvm-guest-drivers-windows,YanVugenfirer/kvm-guest-drivers-windows,ladipro/kvm-guest-drivers-windows,ladipro/kvm-guest-drivers-windows,daynix/kvm-guest-drivers-windows,daynix/kvm-guest-drivers-windows,daynix/kvm-guest-drivers-windows,daynix/kvm-guest-drivers-windows,gnif/kvm-guest-drivers-windows,gnif/kvm-guest-drivers-windows,vrozenfe/kvm-guest-drivers-windows